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Why does the default parameterless constructor go away when you create one with parameters
...you accidentally end up not excluding it, you can screw up your invariants etc.
– Jon Skeet
Aug 3 '12 at 8:56
2
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Named regular expression group “(?Pregexp)”: what does “P” stand for?
...string as that matched by the group named
"foo". Equivalent to \1, \2, etc. except that the group is referred
to by name, not number.
I hope that this Python-specific extension won't conflict with any
future Perl extensions to the Perl regex syntax. If you have plans to
use (?P, plea...
Handler vs AsyncTask vs Thread [closed]
... and main thread.
Use for small waiting operations like the following:
Fetching some data from web services and display over the layout.
Database query.
When you realize that running operation will never, ever be nested.
Handler:
When we install an application in android, then it creates a thr...
angularJS: How to call child scope function in parent scope
...he caller scope is (I mean in $scope.$parent or in $scope.$parent.$parent, etc)? Ah, yes: pass a callback in params! :)
– user2173353
Jul 28 '14 at 11:23
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What are best practices for REST nested resources?
...thin a method on ApiController. In Spring Secirity, SecurityContextHolder.getContext().getAuthentication().getPrincipal() will help you. In AWS NodeJS Lambda, that is cognito:username in headers object.
– Long Nguyen
Aug 16 '19 at 7:57
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How do I print the elements of a C++ vector in GDB?
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To find the special names (_M_impl etc) for your compiler under GDB 7.0+, use print /r myVector
– Eponymous
Nov 30 '15 at 17:53
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Predicate in Java
...the given predicate", "check if all elements satisfy the given predicate", etc make for better code.
Unfortunately Java doesn't have first-class methods: you can't pass methods around to Iterables.filter and Iterables.all. You can, of course, pass around objects in Java. Thus, the Predicate type is...
What is the most accurate way to retrieve a user's correct IP address in PHP?
...e that doesn't honor the headers for http_x_forwarded_for, http_forwarded, etc) and all you get is their proxy server's IP address.
You can then see if there is a list of proxy server IP addresses that are anonymous, but there is no way to be sure that is 100% accurate as well and the most it'd do ...
Does Python optimize tail recursion?
... functions, working in an interactive session rather than editing my code, etc.).
Optimizing tail-recursion in Python is in fact quite easy. While it is said to be impossible
or very tricky, I think it can be achieved with elegant, short and general solutions; I even
think that most of these soluti...
Java lib or app to convert CSV to XML file? [closed]
...hat JSefa brings in is that it can serialize your java objects to CSV/XML/etc files and can deserialize back to java objects. And it's driven by annotations which gives you lot of control over the output.
JFileHelpers also looks interesting.
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